Resisting unlawful arrest
Resisting unlawful arrest is a possible 
justification for breaking the 
law. Defendants who use this 
defense are arguing that they should not be held 
liable for a 
crime, since the 
actionss taken were intended to protect them from an unlawful 
arrest. Many courts will not tolerate any 
violence whatsoever (committed while resisting an unlawful arrest), and almost certainly not "deadly force", unless the 
police began to use violence 
before the defendant began to do so. In short, a defendant might be justified in running away from police attempting an unlawful arrest; but, almost certainly will not be considered justified in 
shooting police who attempt to do so (unless the defendant can somehow 
prove self-defense).